> Traditionally, the inception of Neolithic lifeways in the Western Valleys of northern Chile is believed to have occurred during the early Formative Period (c. 2000 BC)
key word: "believed" re 2000 BC
They also say:
> The chacu and small-scale settlements described above suggest that a range of human groups occupied this landscape from at least 6000 BC to AD 1700. These groups moved strategically across the highlands, tethered primarily to hunting resources, particularly vicuña.
> Traditionally, the inception of Neolithic lifeways in the Western Valleys of northern Chile is believed to have occurred during the early Formative Period (c. 2000 BC)
key word: "believed" re 2000 BC
They also say:
> The chacu and small-scale settlements described above suggest that a range of human groups occupied this landscape from at least 6000 BC to AD 1700. These groups moved strategically across the highlands, tethered primarily to hunting resources, particularly vicuña.
Its simply stated as true.